Stem winding and setting mechanism.



PATENTED MAY 24, 1904.

H.8ANDOZ.. STEM WINDING AND SETTING MEGHANI$M.

APPLICATION FILED 0(JT.Z, 1963.

N0 MODEL.

Norms Pqas co PHOI umo ASHINGTON o c UNITE STATES Patented May 24, 1904.

PATENT OFFICE.

STEM WINDING AND SETTING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 760,647, dated May 24,1904.

Application filed October 2, 1903- To all whom it may concern.-

Be it known that I, HENRI SANDOZ, a citizen of the Republic ofSwitzerland, and a resident of Tavannes, Switzerland, have invented anew inding and Setting Mechanism, of which the following is aspecification.

One form of the winding and setting mechanism which constitutes theobject of this invention is illustrated in the accompanying drawings,given by way of example.

Figures 1 and 2 are elevations, and Fig. 3 a plan, of the winding andsetting mechanism.

This mechanism has an extremely limited number of parts. Its action isreliable and extremely simple.

A lever A, pivoting at a, has three efiective ends, the one, a, engagingin the groove E of the winding-stem G, the second, in the form of anose, being intended to act on the arm B, and the third, M, being underthe influence of a spring R, one end of which engages in the notch 9while the other end of this same spring lodges at r against the arm B,which is pivoted at o, the said arm B engaging in the groove S of themovable pinion D. The spring R thus tends at the same time to raise thestem G and the movable pinion D, so as to place it in contact with thewheel F.

The position of the parts shown in Fig. 1 is that for setting the hour,the movable pinion being in contact with the motion-work wheel (Z. Thisposition is insured by the nose C entering a recess 0 in the arm B. Abridge 10, fixed by two screws 4) Q) on the plate P, supports the threedifferent parts of the mechanism. If the stem G be pressed, the nose OSerial No. 175,484. (No model.)

is moved back, Fig. 2, and no longer retains the arm B, which under theinfluence of the spring R brings the movable pinion into contact withthe crown F, this being the Winding-up position.

The stem G is most generally controlled by a crown stem which isadjusted in the pendant and known as American stem.

The dimensions and to a certain extent the forms of the parts of thismechanism may vary.

Having now described my invention, I claim as new and wish to secure byLetters Patent In winding and setting mechanism for watches, thecombination with a plate of a winding-stem having a groove E therein,and having also a reduced portion, a crown-wheel F on said reducedportion, a sleeve D slidably mounted on said reduced portion and havinga groove S therein, a three-arm lever A pivoted to the plate and havingone of its arms engaging in the slot E, a second lever B engaging in thegroove S and having a slot therein, said slot being in the axial line ofthe pivot of lever A, and a spring having one end engaging with thelever B and its other end engaging with one arm of the three-arm leverA, the third arm of said lever being adapted to engage in the slot inthe lever B when the hands are to be adjusted.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

HENRI SANDOZ.

Witnesses:

ARMAND TENOLET, JEAN J AQUET.

